Meaning : A person or thing equal to another in value or measure or force or effect or significance etc.
Example :
Send two dollars or the equivalent in stamps.
Meaning : The atomic weight of an element that has the same combining capacity as a given weight of another element. The standard is 8 for oxygen.
Synonyms : combining weight, eq, equivalent weight
Meaning : Being essentially equal to something.
Example :
It was as good as gold.
A wish that was equivalent to a command.
His statement was tantamount to an admission of guilt.
Synonyms : tantamount